docs: def countries():
      '''
      get country dictionar from pytz and add some extra.
      '''
      global _countries
      if not _countries:
          v = {}
          _countries = v
          try:
              from pytz import country_names
              for k, n in country_names.items():
                  v[k.upper()] = n
          except Exception:
              pass
      return _countries